I has this problem with my AMD ASUS M4A79T Deluxe and I was resolved using USB version of niresh to install by USB Flash Pen Drive. Forgive DVD version. Later boot using amdfx -f -v -x. Report to me the result. Good Luck !
Niresh 10.8.5 USB Version:
https://www.hackintosh.zone/file/46-nireshs-mac-os-x-mountain-lion-for-amd-and-intel-1085-usb/